I would remove McAfee. Its personal firewall is infamous for blocking Windows Updates. McAfee's competitiors do the same.
Un-install McAfee using the McAfee Removal Tool (MRT) - http://download.mcafee.com/products/...tches/MCPR.exe
Download the McAfee Removal Tool (MRT); save to desktop. Then go to desktop, RIGHT-click on the MRT icon and select Run as Administrator. When complete - re-boot.
Reset the Windows Firewall to its default settings -
START | type FirewallSettings.exe into the start search box | click on FirewallSettings.exe above | select the Advanced Tab | click on "Restore Defaults" | Click Apply, OK
Use AVG for a/v if you wish - http://free.avg.com/download-avg-ant...s-free-edition
Regards. . .